EVALUATION OF MATERNAL ANTIBODY IN CALVES BORNE FROM COW DAM VACCINATED WITH INACTIVATED PNUMO-5 VACCINE

El-Bagoury, G.F.a, El-Nahas, E.M.a, Maha R. Abd-Elfadiel b and Ghaley, H.M. b

Abstract

Forty Pregnant cows were vaccinated with combined inactivated respiratory viruses' vaccine from BVD genotype 1 and BVD genotype 2, IBR, PI-3 and BRS viruses (Pneumo-5) under field condition. Post-delivery, the colostrum and sera from their offspring's were collected for follow up the maternal immune response using Serum neutralization test (SNT) and ELISA. Results revealed that antibodies in colostrum persisted at their higher level till the 3rd day post calving for all reference viruses contained in the vaccine. The maternal antibodies were gradually decreased from 1st day postdelivery till reached lower level at 4 month post-delivery for all reference viruses contained in the vaccine as measured by SNT but the maternal antibodies were detected for 6th month post-delivery by ELISA. It could be concluded that colostrum should be taken at first three days post-calving and the maternal antibodies were persisted till 4th month of age for all reference viruses contained in the vaccine under field conditions

Key words

ELISA, Maternal antibodies, Pneumo-5, SNT